EP1638180A1 - Protective device for bushing insulator - Google Patents

Abstract

The cap is made in one piece from an elastomer material and has a separating slot in the axial direction (2) of the insulator, which is closable and extends into the head of the cap. The cap has openings (5,6) at two cable connecting points, for receiving respective tight-fitting inserts (10a,10b) which can be broken open to provide cable insertion openings. The openings extend on each side to the separating slot.

Description

The present invention relates to a hood for covering the head of an insulating candle, which is arranged between the low-voltage terminal of a power supply unit and a connecting cable extending from the low-voltage terminal either substantially laterally or parallel to the longitudinal axis of the insulating candle.

Such hoods are known, e.g. from DE 296 21 332 A1.

There, a movable cap is provided for the ground terminal of an insulator.

From DE 94 09 218 U1 or DE 196 44 496 C2 further caps are known, but only allow a laterally outgoing cable connection. This problem eliminates the cover according to DE 198 05 059 A1. There, the cable connection can sit sideways or up.

The object of the invention is to provide such a hood, which is easily convertible in a simplified manufacturing process for different connection sides and independently provides adequate protection against contact safety and pollution.

This object is achieved by the invention with the features of the main claim.

It is essential that the hood production side has two prepared openings, one of which is provided in the use of the head and the other side of the hood and that a prepared Paßformeinsatz is provided for each of these openings, with the help of which each not required for the routed cable connections Opening is safe to touch and closed so that contamination of the electrical connection located inside the hood is prevented.

Basically, therefore, the hood on only a single with respect to the axial direction of the insulating candle parallel sides of the peripheral wall on a separating slot, which is closable after slipping the hood over the electrical connection.

Therefore, the separating slot extends only along one of the side walls of the hood into the head of the hood and is broken in particular in the head region of the hood from there opening for the Paßformeinsatz.

The two openings for Paßformeinsätze therefore break through with their transverse to the plane of the separating slot boundary walls the continuous length of the separating slot, so that the separating slot ultimately from the bottom in the use position Stülpöffnung the hood to the first opening, from the first opening to the second Opening and then possibly even a small piece in the direction of the separation slot opposite wall of the hood extends.

Expediently, both openings have matching longitudinal dimensions with respect to the longitudinal axis of the insulation plug and transverse dimensions matching the plane of the separating slot.

This development has the advantage that the Paßformeinsätze for the top and the side opening of the hood can be of matching plan.

It is advisable to limit the depth of the openings to the outside and also inward by a projection, so that the Paßformeinsätze after slipping over the hood over the electrical connection can be easily inserted into the openings without the risk of falling out.

The projection itself must only locally prevent the entrance or fall out of Paßformeinsatzes.

Preferably, however, a projection which runs completely around the opening on the inside and outside is recommended.

The advantage of this embodiment is that the penetration of water or moisture is almost completely excluded by the respective circumferential projection.

To have both openings between the inner and outer projections matching depth dimensions, the compatibility of Paßformstücke is also guaranteed in this respect.

Conveniently, the opening for insertion of the head-side Paßformeinsatzes located at the end of the separating slot, so that the transverse side of the opening means practically the end of the separating slot.

Since the hood is made of elastomeric material, it can be easily put over the electrical connection in this way, without the risk of tearing exists.

The hood must be at least locally closed along the separating slot.

The shutter function must then of Druckklipsen, rivets or similar. be perceived.

In that regard, a tear or sliding closure-like system comes into consideration.

Conveniently, however, wall-like closure flanges are provided on both sides of the separating slot, which have mutually aligned openings for closing the hood by means of appropriate screw plugs.

This development is particularly special quality when the hood is made flexible and elastic in the so-called dipping process.

In this case, a the inner dimensions of the hood corresponding voluminous fitting is heated to a predetermined temperature corresponding to the solidification temperature of a gel at this predetermined temperature plastic, so that with lingering of the voluminous fitting in the liquefied plastic, a time-dependent thickening wall of gelling plastic around the fitting around accumulates and forms in this way, the two wall-like closure flanges.

The Paßformeinsätze consist of a foam-like plastic of about 1 to 3 cm thickness and form in this way each have a stable lid in the hood.

It is proposed so far, at least one of Paßformeinsätze with prefabricated breakable cable grommet openings equip, if necessary, have different diameters.

In this case, several different diameters can be arranged at one and the same location, since the Herausführungsstelle the connection cable is known per se.

In addition, it is proposed to equip at least one of the fitting fittings with a collar which protrudes beyond the projection arranged on the outside of the opening and in this way provides additional protection against unwanted contamination of the electrical connection.

The above-mentioned manufacturing method via a dipping method allows the production of the hood monochrome or multicolored and contrasting.

Substituting such a hood of a further temperature treatment, which should be at a temperature above the solidification temperature of the plastic, arise such hoods with mirror-smooth looking outer surface and obtained in this way a pleasing appearance.

In the following the invention will be explained in more detail by means of exemplary embodiments.

Fig. 1

ein erstes Ausführungsbeispiel der Erfindung im Einbauzustand

Fig. 2

das Ausführungsbeipiel gemäß Figur 1 aus Blickrichtung II-II

Fig. 3

ein Ausführungsbeispiel in Blickrichtung zur seitlichen Richtung III-III

Fig. 4

das Ausführungsbeispiel gemäß Fig. 3 in Blickrichtung VI-VI

Show it:

Fig. 1

a first embodiment of the invention in the installed state

Fig. 2

the Ausführungsbeipiel according to Figure 1 from the viewing direction II-II

Fig. 3

an embodiment in the direction of the lateral direction III-III

Fig. 4

the embodiment of FIG. 3 in the viewing direction VI-VI

Unless otherwise stated below, the following description applies to all figures.

The figures show a hood 1 for covering the head of an insulation candle.

The insulating candle is shown schematically in Fig. 1.

It has at its upper end a screwed threaded rod, which is secured with a lock nut against rotation.

At the upper end of the threaded rod is between two oppositely acting nuts a screw-on flange to which - here - laterally a unspecified connection cable is attached.

Such an insulation candle sits between the low voltage terminal of a power supply unit and the connection cables.

The hood 1 shown therefore serves to cover the insulation candle together with the outgoing connection cable against moisture, pollution and should also have a certain insulating effect against touching.

The connection cable can optionally be led out of the hood substantially laterally corresponding to FIG. 1 or else parallel to the longitudinal axis 2 of the insulation plug.

The hood is mounted in which it is slipped with its Stülpöffnung 16 ahead of the corresponding preassembled connection cable.

In the case shown, the connection cable is led out in the lateral direction 3 from the interior of the hood. The hood is here made in one piece from an elastomeric plastic and has on the side where the cable is led out laterally, a separating slot 4, which separates the jacket of the hood there so far that it can be slipped over the entire head unit of the insulation candle.

The separating slot can be closed by simple means, wherein the continuous length of the separating slot, that is the length which is measured starting at the turn-up opening 16 to the other end, is broken.

The length of the separating slot is composed in this respect of individual partial lengths, wherein the separating slot in each case at the locations of the lateral or in an alternative embodiment parallel to the longitudinal axis outgoing connecting cable of openings 5, 6 is broken, each of which extends on both sides transversely and longitudinally to the separating slot and provides an opening into which a fit insert 10a, b is insertable.

This ensures that one and the same hood 1 is used regardless of the respective connection situation on the insulation candle.

In each case, the opening not required for the passage of the connecting cable is closed with a corresponding Paßformeinsatz, while the complementary Paßformeinsatz is designed for tight completion of the connecting cable.

In addition, the figures show that both openings, so the lateral opening 5 and the head-side opening 6 of each matching longitudinal dimensions 7, which are oriented with respect to the longitudinal center plane 2 of the insulating candle.

However, the angular position between the lateral Paßformeinsatz 10a and the head-side Paßformeinsatz 10b is to be considered.

In principle, both Paßformeinsätze 10 a, 10 b of rectangular plan and have the same longitudinal dimensions 7.

In addition, this also results in that the transverse dimensions 8 coincide, which lie transversely with respect to the plane of the separating slot 4.

The depth dimensions of the openings 5, 6 are identical in the present case and are bounded outwards and inwards by an outer projection 12 or inner projection 11.

Outer projection 12 and inner projection 11 preferably run circumferentially around the opening, so that the fitting inserts 10a, 10b are respectively supported flush and circumferentially on the projections 12,11.

Insofar as the longitudinal, transverse and depth dimensions of the apertures 5, 6 match, the male inserts 10a, 10b are compatible with each other, i. interchangeable, depending on the installation situation at the installation site.

In addition, in particular, Figure 2 shows that the separating slot 4 ends on the head of the hood 1 where the from Separating slot 4 facing away from lateral side 13 of the head-side Paßformeinsatzes 10 ends.

The head-side opening 6 therefore forms an extension of the separating slot 4, so that in particular there the hood is easily widened even when slipping over the electrical connection without the risk of tearing at the end of the separating slot 4 would be given.

In addition, the figures show that the separating slot 4 is bounded by two wall-like closure flanges 22, which are part of the hood 1 and that the closure flanges, at least between the openings 5, 6 have an opening 14 which is penetrated by a screw plug 15.

In this way, by simply turning the screw plug 15, the closure flanges can be pressed flush against each other to achieve the desired density against moisture and dirt.

In addition, viewed from the lateral opening 5 for the lateral Paßformeinsatz 10 a in the direction of the Stülpöffnung 16 of the hood 1, a further opening 17 may be provided to attach there another screw plug.

Thus, the Paßformeinsätze 10a, 10b, both of which, in each case immovably press firmly into the openings 5.6 of the hood 1.

In addition, in particular, Figure 2 shows that at least one of the Paßformeinsätze 10 a, b prefabricated with breakable cable duct openings 18 is provided.

Depending on the thickness of the respective cable can be provided, the cable feed-through opening 18 with different Diameters 19a, b, c to design, so that also complete cables of different diameters flush with the Paßformeinsatz.

For optical reasons in particular, it is recommended that the cable feedthrough openings of different diameters be mounted eccentrically relative to one another in such a way that a common contact point 20 is created, where all breakable pieces are tangent.

Further, Fig. 1 in particular shows that the Paßformeinsätze 10 a, 10 b can either be disposed only within the circumferential projections 11,12 or alternatively can protrude with a collar 21 through the opening to a flush with the hood 1 facing surface of the collar 21 To achieve completion with the outer surface of the hood 1.

In this way, in addition to the tight fit of the respective Paßformeinsatzes in its opening an effective against the outside of the hood 1 labyrinth seal, which is not penetrated even by the finest dust particles.

The hood has substantially the same wall thickness everywhere.

This feature favors the manufacture of the hood in the so-called dipping process.

In this case, a mirror-smooth surface on the hood can be produced by a subsequent to the dipping process temperature treatment.

1 shows that the hood can be made up of two layers, namely an inner layer 119b and an outer layer 119a. The two layers can be colored be different, preferably contrasting with each other.

In addition, a hood should be mitum edits of the invention, the overhead Paßformeinsatz is integrally connected to the elastomer of the hood.

LIST OF REFERENCE NUMBERS

1

Hood

2

Longitudinal axis of the insulating candle

3

lateral direction

4

separating slot

5

lateral opening

6

head-side opening

7

Longitudinal dimension of 5.6

8th

Transverse dimension of 5.6

9

Depth dimension of 5.6

10a

lateral fitting insert

10b

head-side fitting insert

11

inner projection

12

Outer lead

13

opposite transverse side of 6

14

breakthrough

15

Screw

16

Stülpöffnung

17

another breakthrough

18

Cable passage

19a, b, c

various diameters

20

contact point

21

collar

22

sealing flange

119a

outer layer

119b

inner layer

Claims (14)

Hood (1) for covering the head of an insulating candle, which is arranged between the low voltage terminal of a power supply unit and an outgoing from the low voltage terminal either substantially laterally or parallel to the longitudinal axis of the insulating plug connecting cable, wherein the hood (1) is made in one piece from an elastomer and a In the axial direction (2) of the insulating candle extending separating slot (4) which is closable and along one of the side walls of the hood continuously on the side for connection of the laterally arranged connection cable extends into the head of the hood hinen and at the two locations for connection respectively of the laterally or parallel to the longitudinal axis (2) outgoing connecting cable of openings (5,6) for inserting a respective Paßformeinsatzes (10a, b) is broken, wherein the openings (5,6) on both sides transversely and longitudinally to the separating slot (4 ) and a fitting insert (10a, 10b) mi Pre-fabricated breakable cable feedthrough openings in each of the two openings (5; 6) is inserted. Hood according to claim 1, characterized in that both openings (5, 6) are of matching longitudinal and transverse dimensions. Hood according to claim 1 or 2, characterized in that the depth of the openings (5,6) to the outside and inside, in each case by a projection (11,12) preferably each a completely circumferential projection (11,12) is limited. Hood according to claim 3, characterized in that both openings (5, 6) between the outer and inner projections (11, 12) are of matching depth dimensions (9). Hood according to one of claims 1 to 4, characterized in that the separating slot (4) on the head of the hood (1) on the side facing away from the separating slot (4) transverse side (13) of the opening (6) for inserting the head-side Paßformeinsatzes (10b ) ends. Hood according to one of claims 1 to 5, characterized in that the separating slot (4) is delimited by two wall-like closure flanges and that the closure flanges have an opening (14) for a closure screw (15) at least between the openings (5, 6). Hood according to claim 6, characterized in that between the opening (5) for the lateral Paßformeinsatz (10a) and the Stülpöffnung (16) of the hood (1), a further opening (17) for a further closure screw (15) is provided. Hood according to one of claims 1 to 7, characterized in that in each case a plurality of cable feedthrough openings (18) with different diameters (19a, b, c) are provided. Hood according to Claim 8, characterized in that the different (19a, b, c) diameters of the cable lead-through openings (18) have a common contact point (20). Hood according to one of claims 1 to 7, characterized in that at least one of the fitting pieces (10a, 10b) has a collar (21) protruding beyond the opening (5; 6), which extends the respective opening except for the outer surface of the hood (1 ) surmounted. Hood according to one of claims 1 to 10, characterized in that the hood (1) is everywhere of the same wall thickness. Hood according to claim 11, characterized in that the hood (1) is made of a plastic liquefiable at a predetermined temperature, which is solidified by gelling at a predetermined higher temperature. Hood according to claim 11, characterized in that the hood is then subjected to a dartigen temperature treatment, that the outer surface of the hood (1) is mirror-smooth. Hood according to claim 13, characterized in that the upwardly facing Paßformeinsatz is integrally connected to the elastomer of the hood.

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